Hi @tancredi,
it’s not a problem with tracking conversions. It’s most likely a problem with your current tracking setup that isn’t sending all the page views correctly. There might be multiple reasons for that,. For instance, over the last 7 days your account generated 855 javascript errors. Each of those errors could potentially be a blocking one that stopped execution of our analytics tracking script. Even the mentioned thank you page generates an error in browser’s console: